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Get Cube Challenge Timer old version APK for Android
Cube Challenge Timer is a simple timer that allows you to challenge a friend.
It offers two timers and scramblers for all official wca events.
To start the timers both you and your challenger have to touch the display, when you release it both the timers start; the first one who stops, wins.
It may not work on Android <4.0
Cube Challenge works better on tablets